Sure you can argue Israel(+US)'s air defense is much more capable than Iran's, is this ever in question? This sort of comparison is academic at best and has no strategic relevance.
The important question to ask is which side is more sustainable and thus be able to win the war, the attacking side or the defending side? In this instance what is the percentage of air defense munition used versus what is the percentage of offensive munition used? Who can replenish faster?
It is also not just a comparison between Israel's industry and Iran's industry, it is more of a comparison of US industry and Iran industry, Can US afford to spend all of their high end BMD on Israel's defense?